Multistage filtration device in gas production processes

Abstract

The utility model relates to gas purification equipment technical field, concretely relates to multistage filter device in the gas production process, including the air inlet pipe, the end of air inlet pipe is provided with the tee pipe, is provided with the tee valve on the tee pipe, two other pipe bodies of tee pipe are fixedly installed with first conveying pipe and second conveying pipe respectively, the end of first conveying pipe and second conveying pipe all is provided with multistage filter device, and multistage filter device includes first filter bowl, second filter bowl and third filter bowl, and between first filter bowl and second filter bowl, between second filter bowl and third filter bowl all are connected through the lead -through pipe, is provided with the clean pipe on third filter bowl, the detachable installation of first filter bowl has metal filter screen, the detachable installation of second filter bowl has superfine glass fibre layer, hydrophobic PTFE membrane and active carbon fibre layer, the detachable installation of third filter bowl has HEPA fibre filter membrane and molecular sieve adsorption layer, the utility model has multistage filtration's effect, is favorable for guaranteeing gas purity.

Description

Technical Field

[0001] This utility model relates to the field of gas purification equipment technology, specifically to a multi-stage filtration device in the gas production process. Background Technology

[0002] In the gas production process, the raw gas (such as air, synthesis raw gas) often carries a variety of impurities (particles, oil mist, water vapor, VOCs, etc.). The residue of impurities will directly affect the quality of gas products and the life of downstream equipment. In order to ensure the purity of the produced gas, it is usually necessary to filter the gas to remove impurities. When performing filtration, corresponding filtration devices are usually used.

[0003] There are many types of filtration devices on the market, but traditional single-stage or two-stage filtration devices are mostly designed for single impurities (such as filtering only particles or oil mist) and cannot remove multiple types of impurities at the same time. For example, when chemical synthesis gas contains 10-50μm particles, oil mist and trace VOCs at the same time, traditional devices can only remove specific impurities. The purity of the purified gas is relatively low, which is difficult to meet the high-precision requirements of electronics, food and other industries, and affects the performance.

[0004] Furthermore, most filtration devices have only a single filtration system. When this system requires maintenance or other operations, the entire device shuts down and can only be used again after the maintenance is completed, affecting processing efficiency and hindering continuous production. Therefore, we propose a multi-stage filtration system for gas production processes. Utility Model Content

[0005] The purpose of this invention is to provide a multi-stage filtration device for gas production processes to address the deficiencies mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A multi-stage filtration device for gas production includes an inlet pipe with a three-way valve at one end. A first delivery pipe and a second delivery pipe are fixedly installed on the other two sections of the three-way pipe. Each of the first and second delivery pipes has a multi-stage filtration device at its end, comprising a first filter cartridge, a second filter cartridge, and a third filter cartridge. An end pipe is fixedly installed on the first filter cartridge, and the end pipes on the two first filter cartridges are respectively connected to the first and second delivery pipes. The first and second filter cartridges, and the second and third filter cartridges, are connected by connecting pipes. A purification pipe is installed on the third filter cartridge. A metal filter screen is detachably installed inside the first filter cartridge. An ultrafine glass fiber layer, a hydrophobic PTFE membrane, and an activated carbon fiber layer are detachably installed inside the second filter cartridge. A HEPA fiber filter membrane and a molecular sieve adsorption layer are detachably installed inside the third filter cartridge.

[0008] Preferably, the end tube is located below the metal filter screen, and the post-filter tube is located above the molecular sieve adsorption layer.

[0009] Preferably, the hydrophobic PTFE membrane is located above the ultrafine glass fiber layer, and the activated carbon fiber layer is located above the hydrophobic PTFE membrane.

[0010] Preferably, the molecular sieve adsorption layer is located above the HEPA fiber filter membrane, and the metal filter screen has a microporous structure.

[0011] Preferably, a perforated plate is fixedly installed on the inner wall of the first filter cartridge, the second filter cartridge, and the third filter cartridge, and the perforated plate is located below the corresponding filter screen;

[0012] Preferably, a plurality of vertically arranged guide cones are fixedly installed on the bottom surface of the perforated plate, and the guide cones are conical in shape;

[0013] The above two settings can guide the gas flow, directing the gas into the filter evenly and avoiding filter wear caused by local airflow impact.

[0014] Preferably, the tops of the first filter cartridge, the second filter cartridge, and the third filter cartridge are all detachably fitted with top covers, and pressure relief valves are fixedly installed on the top covers;

[0015] This setting enables pressure relief protection when filter blockage leads to excessive pressure.

[0016] Preferably, a drain pipe is fixedly installed at the bottom of the first filter cartridge, the second filter cartridge, and the third filter cartridge, and a drain valve is fixedly installed on the drain pipe;

[0017] This setting facilitates subsequent cleaning and sewage discharge operations.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This utility model, by setting up a first filter cartridge, a second filter cartridge, and a third filter cartridge in a multi-stage filtration device, as well as an internal metal filter screen, an ultra-fine glass fiber layer, a hydrophobic PTFE membrane, an activated carbon fiber layer, a HEPA fiber filter membrane, and a molecular sieve adsorption layer, allows the gas to pass through a step-by-step purification process of particle filtration, oil mist and water vapor removal, and ultra-fine particle and VOCs adsorption. This achieves the simultaneous removal of multiple types of impurities, thereby improving gas purity and meeting the high-precision requirements of industries such as electronics and food.

[0020] 2. This utility model, by setting a three-way pipe and a three-way valve at the end of the air inlet pipe, and connecting a first delivery pipe, a second delivery pipe and two independent multi-stage filtration devices respectively, can switch to the other device to continue operation when one of the filtration devices needs maintenance, thus achieving uninterrupted filtration process and ensuring continuous production and improving processing efficiency.

[0021] 3. This utility model features a detachable top cover, a pressure relief valve, and a drain pipe and drain valve at the bottom of each filter cartridge. The top cover facilitates quick disassembly and replacement of internal filter components, the pressure relief valve protects the device when the filter cartridge pressure is too high, and the drain pipe and drain valve facilitate timely cleaning of trapped impurities. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the multi-stage filtration device of this utility model;

[0024] Figure 3 This is a partial structural schematic diagram of the present invention;

[0025] The meanings of the labels in the diagram are as follows:

[0026] 1. Intake pipe; 10. Three-way pipe; 11. Three-way valve; 12. First delivery pipe; 13. Second delivery pipe;

[0027] 2. Multi-stage filtration device; 20. First filter cartridge; 201. End pipe; 202. Metal filter screen; 21. Second filter cartridge; 211. Ultrafine glass fiber layer; 212. Hydrophobic PTFE membrane; 213. Activated carbon fiber layer; 22. Third filter cartridge; 221. HEPA fiber membrane; 222. Molecular sieve adsorption layer; 23. Top cover; 231. Pressure relief valve; 24. Conductor pipe; 25. Clean pipe; 26. Drain pipe; 261. Drain valve; 27. Mesh plate; 28. Guide cone. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Please see Figures 1-3 This utility model provides a technical solution: a multi-stage filtration device for gas production process, including an inlet pipe 1, a three-way pipe 10 at the end of the inlet pipe 1, a three-way valve 11 on the three-way pipe 10, and a first conveying pipe 12 and a second conveying pipe 13 fixedly installed on the other two pipe bodies of the three-way pipe 10 respectively; a multi-stage filtration device 2 is provided at the ends of the first conveying pipe 12 and the second conveying pipe 13. By setting two sets of multi-stage filtration devices 2, the gas flow direction can be controlled by the three-way valve 11, so that the gas can selectively enter one of the two sets of multi-stage filtration devices 2. When one set is in use, the other set can be maintained and replaced, so as to realize the continuity of gas filtration, avoid production interruption caused by the shutdown and maintenance of a single set of devices, and ensure the stability of the gas production filtration process.

[0031] In this embodiment, the multi-stage filtration device 2 includes a first filter cartridge 20, a second filter cartridge 21, and a third filter cartridge 22. An end pipe 201 is fixedly installed on the first filter cartridge 20. The end pipes 201 on the two first filter cartridges 20 are respectively connected to a first conveying pipe 12 and a second conveying pipe 13. The first filter cartridge 20 and the second filter cartridge 21, and the second filter cartridge 21 and the third filter cartridge 22 are connected by a guide pipe 24. A purification tube 25 is provided on the third filter cartridge 22. A metal filter screen 202 is detachably installed inside the first filter cartridge 20. An ultrafine glass fiber layer 211, a hydrophobic PTFE membrane 212, and an activated carbon fiber layer 213 are detachably installed inside the second filter cartridge 21. The third filter cartridge 22... The cylinder 22 contains a detachable HEPA fiber filter membrane 221 and a molecular sieve adsorption layer 222. The end tube 201 is located below the metal filter screen 202, the purified tube 25 is located above the molecular sieve adsorption layer 222, the hydrophobic PTFE membrane 212 is located above the ultrafine glass fiber layer 211, the activated carbon fiber layer 213 is located above the hydrophobic PTFE membrane 212, and the molecular sieve adsorption layer 222 is located above the HEPA fiber filter membrane 221. The metal filter screen 202 has a microporous structure. The gas passes through coarse filtration, impurity removal, dehumidification and deodorization, and fine filtration adsorption in sequence to achieve multi-dimensional deep filtration, effectively removing impurities, water vapor and odors of different particle sizes from the gas and improving the gas purity.

[0032] Specifically, a perforated plate 27 is fixedly installed on the inner wall of the first filter cartridge 20, the second filter cartridge 21, and the third filter cartridge 22. The perforated plate 27 is located below the corresponding filter screen. Multiple vertically arranged guide cones 28 are fixedly installed on the bottom surface of the perforated plate 27. The guide cones 28 are conical and guide the gas to flow evenly to the perforated plate 27. Then, the gas is dispersed to each filter layer through the perforated plate 27, avoiding local gas impact on the filter layer and causing wear, thus extending the service life of the filter components. At the same time, it ensures that the filter layer is in full contact with the gas and improves the filtration efficiency.

[0033] like Figure 2 As shown, the tops of the first filter cartridge 20, the second filter cartridge 21, and the third filter cartridge 22 are all detachably equipped with top covers 23. A pressure relief valve 231 is fixedly installed on the top cover 23. The detachable top cover 23 facilitates quick disassembly and replacement of internal filter components. The pressure relief valve 231 automatically releases pressure when the filter layer is blocked, causing excessive pressure inside the cartridge. This reduces maintenance difficulty and prevents damage to the device caused by excessive pressure, ensuring safe use of the equipment.

[0034] like Figure 2 As shown, the bottom ends of the first filter cartridge 20, the second filter cartridge 21 and the third filter cartridge 22 are all fixedly installed with a drain pipe 26. A drain valve 261 is fixedly installed on the drain pipe 26. When the drain valve 261 is opened, the impurities and condensate accumulated in the cartridge can be discharged through the drain pipe 26, so as to avoid the impurities remaining and affecting the subsequent filtration effect, keep the inside of the filter cartridge clean and reduce the risk of contamination of the filter components.

[0035] It is worth noting that the metal filter 202 has a pore size between 3μm and 5μm and a porosity between 70% and 85%, which can achieve preliminary filtration of larger impurities; the ultrafine glass fiber layer 211 is used to filter fine particles; the hydrophobic PTFE membrane 212 is used to intercept oil mist and water vapor; the activated carbon fiber layer 213 is used to adsorb trace amounts of oil mist; the HEPA fiber filter membrane 221 can be made of glass fiber, with a filtration accuracy of up to 99.97% for particles larger than 0.2μm, effectively trapping tiny dust and aerosol particles that were not removed in the previous filtration, preventing tiny impurities from entering subsequent stages with the gas and affecting product quality; the molecular sieve adsorption layer 222 is used for moisture absorption.

[0036] In use, the multi-stage filtration device for gas production processes of this utility model allows gas to enter the three-way pipe 10 through the inlet pipe 1, and then pass through the three-way valve 11, the first delivery pipe 12, and the end pipe 201 into the first filter cartridge 20. After being guided by the guide cone 28 and dispersed by the mesh plate 27, the gas is coarsely filtered by the metal filter screen 202. It then enters the second filter cartridge 21 through the guide pipe 24, and sequentially passes through the ultra-fine glass fiber layer 211, the hydrophobic PTFE membrane 212, and the activated carbon fiber layer 213 for impurity removal, dehumidification, and deodorization. Finally, it enters the third filter cartridge 22, where it undergoes fine filtration and adsorption through the HEPA fiber filter membrane 221 and the molecular sieve adsorption layer 222. The purified gas is then output from the purified pipe 25.

[0037] When a set of devices needs maintenance, switch the three-way valve 11 to redirect the gas to the device corresponding to the second delivery pipe 13 to ensure continuous filtration. Remove the top cover 23 of the device to be maintained to replace the filter components. Open the drain valve 261 to discharge impurities through the drain pipe 26. If the pressure inside the cylinder is too high, the pressure relief valve 231 will automatically release the pressure to ensure equipment safety.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-stage filtration device for gas production processes, including an inlet pipe (1), characterized in that: The intake pipe (1) is provided with a three-way pipe (10) at its end, and a three-way valve (11) is provided on the three-way pipe (10). A first delivery pipe (12) and a second delivery pipe (13) are fixedly installed on the other two pipe bodies of the three-way pipe (10). A multi-stage filtration device (2) is provided at the ends of the first delivery pipe (12) and the second delivery pipe (13). The multi-stage filtration device (2) includes a first filter cartridge (20), a second filter cartridge (21) and a third filter cartridge (22). An end pipe (201) is fixedly installed on the first filter cartridge (20). The end pipes (201) on the two first filter cartridges (20) are respectively connected to the first delivery pipe (11). 2) Connected to the second delivery pipe (13), the first filter cartridge (20) and the second filter cartridge (21) are connected by a guide pipe (24), and the second filter cartridge (21) and the third filter cartridge (22) are connected by a guide pipe (24). The third filter cartridge (22) is provided with a purification pipe (25). The first filter cartridge (20) is detachably installed with a metal filter screen (202). The second filter cartridge (21) is detachably installed with an ultrafine glass fiber layer (211), a hydrophobic PTFE membrane (212) and an activated carbon fiber layer (213). The third filter cartridge (22) is detachably installed with a HEPA fiber filter membrane (221) and a molecular sieve adsorption layer (222).

2. The multi-stage filtration device for gas production process according to claim 1, characterized in that: The end tube (201) is located below the metal filter (202), and the post-cleaning tube (25) is located above the molecular sieve adsorption layer (222).

3. The multi-stage filtration device for gas production process according to claim 1, characterized in that: The hydrophobic PTFE membrane (212) is located above the ultrafine glass fiber layer (211), and the activated carbon fiber layer (213) is located above the hydrophobic PTFE membrane (212).

4. The multi-stage filtration device for gas production process according to claim 1, characterized in that: The molecular sieve adsorption layer (222) is located above the HEPA fiber filter membrane (221), and the metal filter (202) has a microporous structure.

5. The multi-stage filtration device for gas production process according to claim 1, characterized in that: A perforated plate (27) is fixedly installed on the inner wall of the first filter cylinder (20), the second filter cylinder (21) and the third filter cylinder (22), and the perforated plate (27) is located below the corresponding filter screen.

6. The multi-stage filtration device for gas production process according to claim 5, characterized in that: Multiple vertically arranged guide cones (28) are fixedly installed on the bottom surface of the perforated plate (27), and the guide cones (28) are conical.

7. The multi-stage filtration device for gas production process according to claim 1, characterized in that: The top of the first filter cartridge (20), the second filter cartridge (21) and the third filter cartridge (22) can be detachably installed with a top cover (23), and a pressure relief valve (231) is fixedly installed on the top cover (23).

8. The multi-stage filtration device for gas production process according to claim 1, characterized in that: The bottom ends of the first filter cartridge (20), the second filter cartridge (21) and the third filter cartridge (22) are all fixedly installed with a drain pipe (26), and a drain valve (261) is fixedly installed on the drain pipe (26).

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